Check out this hit by Ducks defenseman Luca Sbisa on Calgary Flames forward Tim Jackman. While Sbisa does hit Jackman in the head, I definitely think the hit in question looks accidental and not malicious.
For the hit in question, Sbisa was given a five-minute major and a game misconduct for headbutting Jackman. After the hit, Jackman left the game and didn’t return. I don’t think the league will give Sbisa any more supplemental discipline.